I was hiking in the Mariposa Grove in Yosemite when a ground squirrel shot up a small branch to look around, maybe 30 feet from me. Of course I had a wide angle lens on to shoot the sequoias. So I tried to quick change to a zoom lens. Well I’ve got a lens in each hand when he runs down the branch and into a hole. Drats! Just then I notice the bobcat walking down the hill. It crosses the trail, pauses to look at me, and saunters on its way. Once I stop gawking I quick mount the zoom lens and run up after it, but it has blended into the forest. Gone.